The Witcher 3 junk

In The Witcher 3: Wild Hunt, junk items return. This time, however, some junk items can be dismantled into useful crafting components. As junk items have weight, it is better to either sell or dismantle them when available.

Note that certain quest items, once they are no longer needed, will be put in the junk tab and can then be dismantled or sold off like regular items.